Weld repair simulation for the Mock-up 2 of EU FP7 STYLE Project

    Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

    Abstract

    The Mock-up under study is fabricated of austenitic stainless steel with additions of vanadium and niobium to increase its high temperature strength. The Mock-up comprises two pipes welded together to produce a pipe section of 600 mm overall length. After completion of the girth weld, deep weld repair was inserted into the girth weld. Abaqus finite element code was utilised in the welding simulation. Part of the input data was generated with in-house codes. Sequential thermal and mechanical analyses were performed with small strain and displacement formulation. In the mechanical analysis, mixed hardening material model and an anneal temperature of 1100°C was assumed. Symmetry conditions were utilised to reduce the size of the model. The comparison of computed and measured temperatures and stresses shows good agreement. The computed hoop stress at the repair mid-length was higher than axial stress. Both stresses were tensile through the wall thickness. Confidence in the results was also gained as the results were compared to those presented in literature for a repair welding case.
    Original languageEnglish
    Title of host publicationBaltica IX. International Conference on Life Management and Maintenance for Power Plants - Abstracts
    EditorsPertti Auerkari, Juha Veivo
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    Pages24
    ISBN (Electronic)978-951-38-8030-9
    ISBN (Print)978-951-38-8029-3
    Publication statusPublished - 2013
    MoE publication typeNot Eligible
    EventBALTICA IX - International Conference on Life Management and Maintenance for Power Plants - Helsinki-Stockholm, Finland
    Duration: 11 Jun 201313 Jun 2013

    Publication series

    SeriesVTT Technology
    Number107
    ISSN2242-1211

    Conference

    ConferenceBALTICA IX - International Conference on Life Management and Maintenance for Power Plants
    CountryFinland
    CityHelsinki-Stockholm
    Period11/06/1313/06/13

    Fingerprint

    Welds
    Repair
    Welding
    Pipe
    Austenitic stainless steel
    Niobium
    Tensile stress
    Vanadium
    Temperature
    Hardening
    Hot Temperature

    Cite this

    Keinänen, H. (2013). Weld repair simulation for the Mock-up 2 of EU FP7 STYLE Project. In P. Auerkari, & J. Veivo (Eds.), Baltica IX. International Conference on Life Management and Maintenance for Power Plants - Abstracts (pp. 24). Espoo: VTT Technical Research Centre of Finland. VTT Technology, No. 107
    Keinänen, Heikki. / Weld repair simulation for the Mock-up 2 of EU FP7 STYLE Project. Baltica IX. International Conference on Life Management and Maintenance for Power Plants - Abstracts. editor / Pertti Auerkari ; Juha Veivo. Espoo : VTT Technical Research Centre of Finland, 2013. pp. 24 (VTT Technology; No. 107).
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    abstract = "The Mock-up under study is fabricated of austenitic stainless steel with additions of vanadium and niobium to increase its high temperature strength. The Mock-up comprises two pipes welded together to produce a pipe section of 600 mm overall length. After completion of the girth weld, deep weld repair was inserted into the girth weld. Abaqus finite element code was utilised in the welding simulation. Part of the input data was generated with in-house codes. Sequential thermal and mechanical analyses were performed with small strain and displacement formulation. In the mechanical analysis, mixed hardening material model and an anneal temperature of 1100°C was assumed. Symmetry conditions were utilised to reduce the size of the model. The comparison of computed and measured temperatures and stresses shows good agreement. The computed hoop stress at the repair mid-length was higher than axial stress. Both stresses were tensile through the wall thickness. Confidence in the results was also gained as the results were compared to those presented in literature for a repair welding case.",
    author = "Heikki Kein{\"a}nen",
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    booktitle = "Baltica IX. International Conference on Life Management and Maintenance for Power Plants - Abstracts",
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    Keinänen, H 2013, Weld repair simulation for the Mock-up 2 of EU FP7 STYLE Project. in P Auerkari & J Veivo (eds), Baltica IX. International Conference on Life Management and Maintenance for Power Plants - Abstracts. VTT Technical Research Centre of Finland, Espoo, VTT Technology, no. 107, pp. 24, BALTICA IX - International Conference on Life Management and Maintenance for Power Plants, Helsinki-Stockholm, Finland, 11/06/13.

    Weld repair simulation for the Mock-up 2 of EU FP7 STYLE Project. / Keinänen, Heikki.

    Baltica IX. International Conference on Life Management and Maintenance for Power Plants - Abstracts. ed. / Pertti Auerkari; Juha Veivo. Espoo : VTT Technical Research Centre of Finland, 2013. p. 24 (VTT Technology; No. 107).

    Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

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    T1 - Weld repair simulation for the Mock-up 2 of EU FP7 STYLE Project

    AU - Keinänen, Heikki

    PY - 2013

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    N2 - The Mock-up under study is fabricated of austenitic stainless steel with additions of vanadium and niobium to increase its high temperature strength. The Mock-up comprises two pipes welded together to produce a pipe section of 600 mm overall length. After completion of the girth weld, deep weld repair was inserted into the girth weld. Abaqus finite element code was utilised in the welding simulation. Part of the input data was generated with in-house codes. Sequential thermal and mechanical analyses were performed with small strain and displacement formulation. In the mechanical analysis, mixed hardening material model and an anneal temperature of 1100°C was assumed. Symmetry conditions were utilised to reduce the size of the model. The comparison of computed and measured temperatures and stresses shows good agreement. The computed hoop stress at the repair mid-length was higher than axial stress. Both stresses were tensile through the wall thickness. Confidence in the results was also gained as the results were compared to those presented in literature for a repair welding case.

    AB - The Mock-up under study is fabricated of austenitic stainless steel with additions of vanadium and niobium to increase its high temperature strength. The Mock-up comprises two pipes welded together to produce a pipe section of 600 mm overall length. After completion of the girth weld, deep weld repair was inserted into the girth weld. Abaqus finite element code was utilised in the welding simulation. Part of the input data was generated with in-house codes. Sequential thermal and mechanical analyses were performed with small strain and displacement formulation. In the mechanical analysis, mixed hardening material model and an anneal temperature of 1100°C was assumed. Symmetry conditions were utilised to reduce the size of the model. The comparison of computed and measured temperatures and stresses shows good agreement. The computed hoop stress at the repair mid-length was higher than axial stress. Both stresses were tensile through the wall thickness. Confidence in the results was also gained as the results were compared to those presented in literature for a repair welding case.

    M3 - Conference abstract in proceedings

    SN - 978-951-38-8029-3

    T3 - VTT Technology

    SP - 24

    BT - Baltica IX. International Conference on Life Management and Maintenance for Power Plants - Abstracts

    A2 - Auerkari, Pertti

    A2 - Veivo, Juha

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    Keinänen H. Weld repair simulation for the Mock-up 2 of EU FP7 STYLE Project. In Auerkari P, Veivo J, editors, Baltica IX. International Conference on Life Management and Maintenance for Power Plants - Abstracts. Espoo: VTT Technical Research Centre of Finland. 2013. p. 24. (VTT Technology; No. 107).